In sum, if you can’t connect your data to LibraryThing now, you aren’t trying!

If there’s interest, I can add a JSON version.

*You need to provide either an ISBN (ISBN10 or 13; with dashes or not) or a title and author. Authors can be in last-first (preferred) or first-last (fine). You can omit the author and tack it onto the title, eg., “Huckleberry Finn / Twain, Mark.” It’s very forgiving about punctuation, capitalization and so forth. It doesn’t make wild guesses, but it makes sensible ones.